Perez is not in the main cast, he is the back-up for Frankie Valli and also other three characters in the musical. “I’m so happy to be here. I’ve been on the road four months now with the show,” said Perez. But he isn’t necessarily guaranteed to be on stage. “If anything happens to anyone during the show, has to leave or anything, I jump in or if anyone gets sick one day, I jump in.”